Preparation method of spherical mesoporous carbon-loaded noble metal catalyst
A noble metal catalyst and noble metal technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of low catalytic performance of noble metal, poor dispersion effect of noble metal, preparation process Complicated problems, to achieve good economic benefits, easy promotion, and good product stability
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[0044] Example 1
[0045] (1) Spherical mesoporous carbon is prepared by inverse suspension polymerization, and the specific surface area and pore diameter of the mesoporous carbon are controlled by adjusting the amount of dispersant added in the suspension polymerization method, and the specific surface area is 400-600m. 2 / g, mesoporous carbon with pore diameter between 7.5-9.5nm;
[0046] (2) Add the precious metal platinum-containing salt solution to the nitric acid solution with a concentration of 5mol / L, heat and stir to obtain an impregnation solution, the heating temperature is 50℃, the stirring time is 5h, and the mass ratio of precious metal to mesoporous carbon is 0.4: 1;
[0047] (3) Using the equal volume immersion method, immerse the mesoporous carbon in the above immersion liquid, heat and stir, the heating temperature is 70℃, the stirring time is 3h, adjust the pH value to 4-5 and continue constant temperature stirring with ultrasonic vibration 10h;
[0048] (4) Put t...
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[0050] Example 2
[0051] (1) The hard template method is used to prepare spherical mesoporous carbon. The specific surface area and pore diameter of the mesoporous carbon are controlled by adjusting the amount of carbon source added in the template method, and the specific surface area is between 400-600m. 2 / g, mesoporous carbon with pore diameter between 7.5-9.5nm;
[0052] (2) Add the precious metal palladium-containing salt solution to the 0.5mol / L hydrochloric acid solution, heat and stir to obtain an impregnation solution, the heating temperature is 50℃, the stirring time is 5h, and the mass ratio of precious metal to mesoporous carbon is 0.35 :1;
[0053] (3) Adopt the excessive dipping method, immerse the mesoporous carbon in the above dipping liquid, heat and stir, the heating temperature is 65℃, the stirring time is 2h, adjust the pH value to 4-5, continue constant temperature stirring and supplemented by ultrasonic vibration for 10h ;
[0054] (4) Put the impregnated meso...
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[0056] Example 3
[0057] (1) Spherical mesoporous carbon is prepared by inverse suspension polymerization, and the specific surface area and pore diameter of the mesoporous carbon are controlled by adjusting the amount of dispersant added in the suspension polymerization method, and the specific surface area is 400-600m. 2 / g, mesoporous carbon with pore diameter between 7.5-9.5nm;
[0058] (2) Add the noble metal rhodium-containing salt solution to the 8mol / L sulfuric acid solution, heat and stir to obtain the impregnation solution, the heating temperature is 60℃, the stirring time is 6h, and the mass ratio of noble metal to mesoporous carbon is 0.45:1 ;
[0059] (3) Using the equal volume immersion method, immerse the mesoporous carbon in the above-mentioned immersion liquid, heat and stir, the heating temperature is 80℃, the stirring time is 4h, adjust the pH value to 4-5 and continue constant temperature stirring with ultrasonic vibration 10h;
[0060] (4) Put the impregnated me...
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